505766690 has 128 divisors (see below), whose sum is σ = 1121541120. Its totient is φ = 163088640.

The previous prime is 505766687. The next prime is 505766707. The reversal of 505766690 is 96667505.

It is a super-2 number, since 2×505766690² = 511599889427112200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6402071 + ... + 6402149.

It is an arithmetic number, because the mean of its divisors is an integer number (8762040).

Almost surely, 2^505766690 is an apocalyptic number.

505766690 is an abundant number, since it is smaller than the sum of its proper divisors (615774430).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

505766690 is a wasteful number, since it uses less digits than its factorization.

505766690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 44.

The square root of 505766690 is about 22489.2572131674. The cubic root of 505766690 is about 796.7402197067.

The spelling of 505766690 in words is "five hundred five million, seven hundred sixty-six thousand, six hundred ninety".